Gas-motor.



3 Sheets-Sheet I.

Patented Nov. I3, |900.

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G A S M 0 T0 R.

(Applicgtiun mail nn. 5, 1900.)

3 Sheets-Sheet 2.

(No Modal.)

TNE NORRIS PETERS C D, FHOTOALITHO.. WASHINGTONA D. CA

No. 66|,865. A Patented Nov. I3, |900. N. A. GUILLAUME.

GAS MOTOR.

(Appliction led Jan. 5, 1900.) v (No Model.) 3 Sheets-Sheet 3,

P h o A J' M E!!! @P Il? -EELAQL rfgivugggg Farms oo. woraumo..WASHINGTON UNITED STATES lPATENT EEICE,

N'ARoISSE ALEXANDRE GUILLAUME, oE PARIS, FRANCE.

GAS-MOTOR.

SPECIFICATION forming part of Letters Patent No. 661,865, dated November13, 19.

Application iiled January 5, 1900. Seria-l No. 497. (No model.)

T0 all whom t may concern.'

Be it known that I, NARCISSE ALEXANDRE GUILLAUME, a citizen of France,residing at Paris, France, have invented certain new and usefulImprovements in Gas-Motors, of which the following is a specification.

The object of this invention is to provide improvements inexplosion-engines, and more especially iu four-stroke engines, wherebythe whole of the burned gases at the termination of the fourth stage ofthe cycle are expelled.

The improvement Inainly consists in the interposition between thedriving-piston andthe bottom of the cylinder of a separate movablebottom in the form of a double piston adapted to compress the airbetween it and the stationary bottom of the cylinder during the secondstage and at the beginning of the third stage of the cycle. In thecourse of the third stage, during the expansion of the explosiongases,and during the fourth stage of the cycle the said movable bottom isdriven forward by the expansion of the air which it has previouslycompressed. The combustion-chainber is reduced to minimum capacity, andthe entire expulsion of the burned gases is insured.

In order that my invention may be fully understood, I will describe thesame with ret'- erence to the accompanying drawings, in which- Figure lshows my invention applied to a four-stroke explosion-engine, said viewbeing a longitudinal section of the engine. Fig. 2 is a cross-section ofthe same. Fig. 3 represents, on a reduced scale, an elevation of thewhole engine.

The engine comprises a double-cased cylinder a, in which casing orjacket water is caused to circulate, while a driving-piston b is adaptedto move within the cylinder. Between this piston and the stationarybottom c of the cylinder is a double piston d, which is also adapted formoving freely within the said cylinder and constitutes a movable bottomto the cylinder. Upon this movable bottom there are arranged segments e,serving to cut off all connection between the combustionchamber formedby the rear or bottom surface of the driving-piston and the frontsurface of the double piston or movable bottom d and the air-chamberformed between the rear surface of the double piston and the surface ofthe stationary bottom c of the cylinder. In the portion of thecylinder-wall between the combustion-chamber and the air-chamberapertures fare provided for connecting the interior of the cylinder withthe atmosphere in the event of a gas-escape toward the airchamber takingplace. These aperturesfor chambers also facilitate lubrication, whiletwo lateral stops t' serve to arrest the movable bottom when in itscentral position in the cyl- I inder, Fig. l, uncovers a channel g orport provided in the cylinder-casing and serving to connect theair-chamber with the atmosphere.

In order to accurately time the return stroke of the movable bottom toits normal position, the said movable bottom may be connected to springsh, arranged on either side of the cylinder, the said springs beingcompressed at the same time as the air is compressed iuthe air-chamberduring the second phase and at the beginning 0f the third. During thelatter period of the third phase and during the fourth phase thesesprings restore the said movable bottom to its exact initial position. Astop t', arranged on either side of the cylinder, serves to limit therearward stroke of the movable bottom and to prevent it from moving pastits normal position.

It will be understood that in view of the provision of the springs 72the stationary cylinder-bottom c, and consequently the airchamber, mightbe dispensed with altogether, it being sufficient in that case to securethe springs 7L at convenient points of the cylinder-casing.

The inlet-valve f for the explosive mixture and the exhaust-valve lo arearranged practically opposite each other in the longitudinal center ofthe outer cylinder-wall and are controlled, as is also the gas-inletvalve m, by cams n, rigidly mounted upon the same shaft o that operatesthe governor p, the said cams rnl acting upon bell-crank levers q, whichoperate the rods of the said valves, while springs fr serve to draw themback to their seats.

The ignition device may be of any suitable kind; but electric ignitionis that preferred, as shown in Fig. 2.

IOO

At the beginning of the cycle the drivingpiston h and the movable bottomd are approximately close to each other and are placed in the positionsshown in Fig. 1. During the second stage or phase and at thecommencement of the third compression and explosion the movable bottomcompresses the airagainst the stationary bottom c. The air thuscompressed will at the termination of the third phase and during thefourth force the movable bottom-piece forward, the drivin g-piston inthe meantime performing its return stroke. Inasmnch as thecombustion-chamber 'is thereby reduced to a minimum of space, the burnedgases will be wholly expelled after the fourth phase.

As before stated, the return of the movable bottom-piece to-its normalposition may be accurately timed by means of springs h and stop z', themovable bottom-piece being at the same time prevented from impinging onthe driving-piston.

To insure an even motion of the engine and avoid concussion, the movablebottom may be connected with a dash-pot. (Illustrated by dotted lines inFig. l.)

Having now particularly described and ascertained the nature of myinvention and the manner in which it may be performed, I declare thatWhat I claim isl. In engines of the character described, the combinationof a cylinder, a driving-.pis-

ton, a spring-actuated auxiliary piston, andV an air-chamber arrangedbetween said auxiliary piston and the bottom of said cylinder, andcommunicating with the external air through air-inlets uncovered bysaidauxiliary pistou, said auxiliary piston having lat-A eral stopsengaging elongated slots in said cylinder, substantially as described.

2. In engines of the character described, the combi-nation of acylinder, a driving-piston, a spring-actuated auxiliary piston, an

air-chamber between said auxiliary piston and the bottom of saidcylinder, said cylinder having lateral outlets arranged intermediatelyof the combustion and air chambers, and stops connected to saidauxiliary piston and engaging elongated slots in said cylinder,substantially as set forth.

3. In engines of the character described, the combination of a cylinderor chamber, a driving-piston, a spring-actuated auxiliary movable bottomarranged between said driving-piston and the bottom proper, saidauxiliary movable bottom or pistou having lateral stops engagingelongated slots in said cylinder or chamber, substantially as set forth.

4. In engines of the character described, the combination of a cylinderor chamber, having an air-chamber next to its bottom, an air-inlettherefor, a driving-piston and an auxiliary movable bottom, adapted touncover said air-inlets and serve as a supplemental piston and arrangedbetween said drivingpiston and said air-chamber, substantially as setforth.

5. In engines of the character described, the combination of a cylinderor chamber having an air-chamber next to the bottom, a driving-piston,and an auxiliary movable bottom, adapted to act as a supplementalpiston, and arranged betweensaid driving-piston and air-chamber saidcylinder or chamber Yalso having a lateral outlet or opening betweensaid air-chamber and the combustion-chamber, substantially as set forth.

In testimony `whereof I have hereunto set my hand in presence of twosubscribing witnesses.

NARCISSE ALEXANDRE GUILLAUME.

Witnesses:

EDWARD P. MACLEAN, HIPPOLYTE J ossn.

